.App {
    width: 100vw;
    height: 100vh;
    .tab_bar {
        width: 100vw;
        height: 54px;
        background: rgb(255, 255, 255);
        position: fixed;
        bottom: 0;
        box-shadow: 0 0 2px #e8e8e8;
        display: flex;
        //   justify-content: space-around;
        align-items: center;
        z-index: 99;
        a {
            flex: 1;
            height: 100%;
            line-height: 54px;
            text-align: center;
            color: #7e7e7e;
            font-size: 14px;
            text-decoration: none;
            &.active {
                color: red;
            }
        }
    }
}